refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -6,14 +6,14 @@
   <ItemGroup>
     <PackageVersion Include="Codeuctivity.ImageSharpCompare" Version="4.1.390" />
     <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.2.0" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.5.1" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
     <PackageVersion Include="NUnit" Version="4.6.1" />
     <PackageVersion Include="NUnit3TestAdapter" Version="6.2.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.174" />
     <PackageVersion Include="SixLabors.ImageSharp" Version="4.0.0" />
-    <PackageVersion Include="Verify" Version="31.17.0" />
+    <PackageVersion Include="Verify" Version="31.18.0" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />
-    <PackageVersion Include="Verify.NUnit" Version="31.17.0" />
+    <PackageVersion Include="Verify.NUnit" Version="31.18.0" />
     <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.1.5" />
     <PackageVersion Include="Argon" Version="0.34.0" />
     <PackageVersion Include="DiffEngine" Version="19.2.0" />